radiobutton postback change event

I have half a dozen web form radio buttons on a web form. Each of them is set to postback=true. However, if for instance radiobutton1 is already selected and the user selects it again, it performs a postback.

I only want to do a postback if the value of the radiobutton is changed.

"dave" <> wrote in message
news:...
>I have half a dozen web form radio buttons on a web form. Each of them is
>set to postback=true. However, if for instance radiobutton1 is already
>selected and the user selects it again, it performs a postback.
>
> I only want to do a postback if the value of the radiobutton is changed.
>
> What is the best method to accomplish this?
> thx
> dave

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